激光粉末床熔融的熔道宽度与熔池温度的预测:一种新型数值模拟模型的提出与验证

Prediction for melt track width and melt pool temperature in laser powder bed fusion:Development and validation of novel numerical simulation model

为了减少预测激光粉末床熔融熔道宽度与熔池峰值温度所需的计算资源,本研究提出了一种精度高、计算资源消耗少、对常见合金材料适用的数值模拟模型。在保证模拟精度的情况下,采用此模型可以使计算成本降低2个数量级,对于Ti6Al4V合金、AlSi10Mg合金、316L合金和In 718合金,本模型对熔道宽度、熔池峰值温度的预测值的平均相对误差值±标准差值分别为4.8%±3.1%和7.9%±3.6%,说明模型预测值与实验值较为吻合。本研究提出的模型在保证较高模拟精度的情况下,可以大大降低激光粉末床熔融数值模拟的计算成本,具有很强的实用价值。

In order to save computational cost of numerical simulation for laser powder bed fusion,this research proposed a numerical simulation model with high accuracy,consumed much less computational resources and applied to common alloys.In order to ensure the simulation accuracy,the total computation cost could be reduced by two orders of magnitude.For Ti6Al4V alloy,AlSi10Mg alloy,316L alloy and In 718 alloy,the average relative error±standard error for melt track width prediction and melt pool peak temperature prediction are 4.8%±3.1% and 7.9%±3.6%,respectively,indicating that the predicted values match the experimental values well.In conclusion,this model can significantly reduce computational cost of numerical simulation for laser powder bed fusion without sacrificing simulation accuracy,and has strong practical value.